Convert an LCH color to a LAB color

const lchToLab = (l, c, h) => [
    l,
    Math.cos(h * Math.PI / 180) * c,
    Math.sin(h * Math.PI / 180) * c,
];

const lchToLab = (l: number, c: number, h: number): number[] => [
    l,
    Math.cos(h * Math.PI / 180) * c,
    Math.sin(h * Math.PI / 180) * c,
];